1
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Krochmal D, Roman C, Lewicka A, Shao Y, Piccirilli JA. Structural basis for promiscuity in ligand recognition by yjdF riboswitch. Cell Discov 2024; 10:37. [PMID: 38565535 PMCID: PMC10987639 DOI: 10.1038/s41421-024-00663-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Accepted: 02/16/2024] [Indexed: 04/04/2024] Open
Affiliation(s)
- Daniel Krochmal
- Department of Biochemistry and Molecular Biology, University of Chicago, Chicago, IL, USA
| | - Christina Roman
- Department of Biochemistry and Molecular Biology, University of Chicago, Chicago, IL, USA
| | - Anna Lewicka
- Department of Biochemistry and Molecular Biology, University of Chicago, Chicago, IL, USA
| | - Yaming Shao
- Department of Biochemistry and Molecular Biology, University of Chicago, Chicago, IL, USA
| | - Joseph A Piccirilli
- Department of Biochemistry and Molecular Biology, University of Chicago, Chicago, IL, USA.
- Department of Chemistry, University of Chicago, Chicago, IL, USA.
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2
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Alešković M, Šekutor M. Overcoming barriers with non-covalent interactions: supramolecular recognition of adamantyl cucurbit[ n]uril assemblies for medical applications. RSC Med Chem 2024; 15:433-471. [PMID: 38389878 PMCID: PMC10880950 DOI: 10.1039/d3md00596h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Accepted: 11/30/2023] [Indexed: 02/24/2024] Open
Abstract
Adamantane, a staple in medicinal chemistry, recently became a cornerstone of a supramolecular host-guest drug delivery system, ADA/CB[n]. Owing to a good fit between the adamantane cage and the host cavity of the cucurbit[n]uril macrocycle, formed strong inclusion complexes find applications in drug delivery and controlled drug release. Note that the cucurbit[n]uril host is not solely a delivery vehicle of the ADA/CB[n] system but rather influences the bioactivity and bioavailability of drug molecules and can tune drug properties. Namely, as host-guest interactions are capable of changing the intrinsic properties of the guest molecule, inclusion complexes can become more soluble, bioavailable and more resistant to metabolic conditions compared to individual non-complexed molecules. Such synergistic effects have implications for practical bioapplicability of this complex system and provide a new viewpoint to therapy, beyond the traditional single drug molecule approach. By achieving a balance between guest encapsulation and release, the ADA/CB[n] system has also found use beyond just drug delivery, in fields like bioanalytics, sensing assays, bioimaging, etc. Thus, chemosensing in physiological conditions, indicator displacement assays, in vivo diagnostics and hybrid nanostructures are just some recent examples of the ADA/CB[n] applicability, be it for displacements purposes or as cargo vehicles.
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Affiliation(s)
- Marija Alešković
- Department of Organic Chemistry and Biochemistry, Ruđer Bošković Institute Bijenička 54 10 000 Zagreb Croatia
| | - Marina Šekutor
- Department of Organic Chemistry and Biochemistry, Ruđer Bošković Institute Bijenička 54 10 000 Zagreb Croatia
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3
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Chowdhury A, Goswami S. Study of Drug Delivery Using Purely Organic Macrocyclic Containers-Cucurbit[7]uril and Pillararene. ACS OMEGA 2023; 8:47340-47366. [PMID: 38144095 PMCID: PMC10733925 DOI: 10.1021/acsomega.3c05465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 11/10/2023] [Accepted: 11/20/2023] [Indexed: 12/26/2023]
Abstract
An impaired immune system is the root of various human ailments provoking the urge to find vehicle-mediated quick delivery of small drug molecules and other vital metabolites to specific tissues and organs. Thus, drug delivery strategies are in need of improvement in therapeutic efficacy. It can be achieved only by increasing the drug-loading capacity, increasing the sustained release of a drug to its target site, easy relocation of drug molecules associated with facile complexation-induced properties of molecular vehicles, and high stimuli-responsive drug administration. Supramolecular drug delivery systems (SDDS) provide a much needed robust yet facile platform for fabricating innovative drug nanocarriers assembled by thermodynamically noncovalent interaction with the tunable framework and above-mentioned properties. Measures of cytotoxicity and biocompatibility are the two main criteria that lie at the root of any promising medicinal applications. This Review features significant advancements in (i) supramolecular host-guest complexation using cucurbit[7]uril (CB[7]), (ii) encapsulation of the drug and its delivery application tailored for CB[7], (iii) self-assembly of supramolecular amphiphiles, (iv) supramolecular guest relay using host-protein nanocavities, (v) pillararene (a unique macrocyclic host)-mediated SDDS for the delivery of smart nanodrugs for siRNA, fluorescent molecules, and insulin for juvenile diabetes. Furthermore, fundamental questions and future hurdles related to smart SDDS based on CB[7] and pillararenes and their future promising breakthrough implementations are also distinctly outlined in this Review.
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Affiliation(s)
- Arnab
Roy Chowdhury
- Department of Chemistry, Amity
University Kolkata, Kolkata, West Bengal 700135, India
| | - Soumyabrata Goswami
- Department of Chemistry, Amity
University Kolkata, Kolkata, West Bengal 700135, India
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4
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Venkataramanan NS, Suvitha A, Sahara R, Kawazoe Y. Unveiling the gemcitabine drug complexation with cucurbit[n]urils (n = 6–8): a computational analysis. Struct Chem 2023. [DOI: 10.1007/s11224-023-02133-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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5
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Liu HK, Lin F, Yu SB, Wu Y, Lu S, Liu YY, Qi QY, Cao J, Zhou W, Li X, Wang H, Zhang DW, Li ZT, Ma D. Highly Water-Soluble Cucurbit[8]uril Derivative as a Broad-Spectrum Neuromuscular Block Reversal Agent. J Med Chem 2022; 65:16893-16901. [PMID: 36480913 DOI: 10.1021/acs.jmedchem.2c01677] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Broad-spectrum agents for the reversal of residual curarization induced by neuromuscular blocking agents are of great significance. Here, we report a highly water-soluble cucurbit[8]uril (CB[8]) derivative as a broad-spectrum neuromuscular block reversal agent induced by both benzylisquinolinium and aminosteroid neuromuscular block agents by the supramolecular sequestration strategy. The UV/Vis competition titration assays suggest the high binding affinity of the CB[8] derivative toward both benzylisquinolinium-type cisatracurium besylate and aminosteroid-type rocuronium, vecuronium, and pancuronium, at the level of 107 M-1. In vivo studies demonstrate that the administration of the CB[8] derivative could significantly accelerate the recovery time compared to the placebo or neostigmine groups. The reversal activity of the CB[8] derivative is comparable to or higher than that of clinically approved sugammadex. Acute toxicity evaluations reveal that the CB[8]-derivative displays outstanding biocompatibility, with the maximum tolerance dose as high as 960 mg kg-1.
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Affiliation(s)
- Hong-Kun Liu
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, 2205 Songhu Road, Shanghai 200438, China
| | - Furong Lin
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry (SIOC), Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Shang-Bo Yu
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry (SIOC), Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Yan Wu
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, 2205 Songhu Road, Shanghai 200438, China
| | - Shuai Lu
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518055, P.R. China
| | - Yue-Yang Liu
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, 2205 Songhu Road, Shanghai 200438, China
| | - Qiao-Yan Qi
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry (SIOC), Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Jin Cao
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry (SIOC), Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Wei Zhou
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, 2205 Songhu Road, Shanghai 200438, China
| | - Xiaopeng Li
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518055, P.R. China
| | - Hui Wang
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, 2205 Songhu Road, Shanghai 200438, China
| | - Dan-Wei Zhang
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, 2205 Songhu Road, Shanghai 200438, China
| | - Zhan-Ting Li
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, 2205 Songhu Road, Shanghai 200438, China.,Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry (SIOC), Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Da Ma
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, 2205 Songhu Road, Shanghai 200438, China
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6
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Garcia AC, Zakharov LN, Pluth MD. Supramolecular Activation of S 8 by Cucurbiturils in Water and Mechanism of Reduction to H 2S by Thiols: Insights into Biological Sulfane Sulfur Trafficking. J Am Chem Soc 2022; 144:15324-15332. [PMID: 35929817 DOI: 10.1021/jacs.2c06332] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Reactive sulfur species (RSS) play critical roles in diverse chemical environments. Molecules containing sulfane sulfur (S0) have emerged as key species involved in cellular redox buffering as well as RSS generation, translocation, and action. Using cucurbit[7]uril (CB[7]) as a model hydrophobic host, we demonstrate here that S8 can be encapsulated to form a 1:1 host guest complex, which was confirmed by solution state experiments, mass spectrometry, and X-ray crystallography. The solid state structure of CB[7]/S8 shows that the encapsulated S8 is available to nucleophiles through the carbonyl portals of the host. Treatment of CB[7]/S8 with thiols results in efficient reduction of S8 to H2S in water at physiological pH. We establish that encapsulated S8 is attacked by a thiol within the CB[7] host and that the resultant soluble hydropolysulfide is ejected into solution, where it reacts further with thiols to generate soluble sulfane sulfur carriers and ultimately H2S. The formation of these intermediate is supported by observed kinetic saturation behavior, competitive inhibition experiments, and alkylative trapping experiments. We also demonstrate that CB[7]/S8 can be used to increase sulfane sulfur levels in live cells using fluorescence microscopy. More broadly, this work suggests a general activation mechanism of S8 by hydrophobic motifs, which may be applicable to proteins, membranes, or other bimolecular compartments that could transiently bind and solubilize S8 to promote reaction with thiols to solubilize and shuttle S8 back into the redox labile sulfane sulfur pool. Such a mechanism would provide an attractive manifold in which to understand the RSS translocation and trafficking.
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Affiliation(s)
- Arman C Garcia
- Department of Chemistry and Biochemistry, Materials Science Institute, Knight Campus for Accelerating Scientific Impact, and Institute of Molecular Biology, University of Oregon, Eugene, Oregon 97403-12532, United States
| | - Lev N Zakharov
- Department of Chemistry and Biochemistry, Materials Science Institute, Knight Campus for Accelerating Scientific Impact, and Institute of Molecular Biology, University of Oregon, Eugene, Oregon 97403-12532, United States
| | - Michael D Pluth
- Department of Chemistry and Biochemistry, Materials Science Institute, Knight Campus for Accelerating Scientific Impact, and Institute of Molecular Biology, University of Oregon, Eugene, Oregon 97403-12532, United States
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7
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Djavani-Tabrizi I, Jockusch RA. Gas-Phase Fluorescence of Proflavine Reveals Two Close-Lying, Brightly Emitting States. J Phys Chem Lett 2022; 13:2187-2192. [PMID: 35230120 DOI: 10.1021/acs.jpclett.2c00201] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Surprising excitation-dependent, dual emission from a small organic model fluorophore is reported. Gas-phase fluorescence spectra of proflavine (a diaminoacridine) ions reveal two long-lived emitting states, with distinct bands separated by just 1700 cm-1. The relative intensities of these two bands depend on the excitation wavelength. Time-dependent density functional theory (TD-DFT) calculations support the existence of two close-lying singlet electronic states, with excitation into S2 predicted to be >1000-fold more likely than into S1. These data strongly suggest that internal conversion (IC) rates are suppressed relative to solvated proflavine, and that IC is competitive with intramolecular vibrational relaxation (IVR). This work offers an in-depth assessment of the gas-phase photophysics of a simple fluorophore that could open a new pathway to understanding dual emission in fluorophores.
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Affiliation(s)
| | - Rebecca A Jockusch
- Department of Chemistry, University of Toronto, Toronto, Ontario M5S3H6, Canada
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8
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Rakrai W, Tabtimsai C, Kaewtong C, Wanno B. Theoretical investigation of the complexation, structural, and electronic properties of complexes between oseltamivir drug and cucurbit[n = 6–9]urils. Struct Chem 2022. [DOI: 10.1007/s11224-022-01888-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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9
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Aliakseyeu A, Hlushko R, Sukhishvili SA. Nonionic star polymers with upper critical solution temperature in aqueous solutions. Polym Chem 2022. [DOI: 10.1039/d2py00216g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Novel UCST star poly(2-ureido methacrylates) synthesized via the ARGET ATRP technique showed enhanced trapping abilities of model drug molecules.
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Affiliation(s)
- Aliaksei Aliakseyeu
- Department of Materials Science & Engineering, Texas A&M University, College Station, Texas 77843, USA
| | - Raman Hlushko
- Department of Materials Science & Engineering, Texas A&M University, College Station, Texas 77843, USA
| | - Svetlana A. Sukhishvili
- Department of Materials Science & Engineering, Texas A&M University, College Station, Texas 77843, USA
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10
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11
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Lee H, Shahrivarkevishahi A, Lumata JL, Luzuriaga MA, Hagge LM, Benjamin CE, Brohlin OR, Parish CR, Firouzi HR, Nielsen SO, Lumata LL, Gassensmith JJ. Supramolecular and biomacromolecular enhancement of metal-free magnetic resonance imaging contrast agents. Chem Sci 2020; 11:2045-2050. [PMID: 32180926 PMCID: PMC7053506 DOI: 10.1039/c9sc05510j] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Accepted: 01/14/2020] [Indexed: 12/20/2022] Open
Abstract
Many contrast agents for magnetic resonance imaging are based on gadolinium, however side effects limit their use in some patients. Organic radical contrast agents (ORCAs) are potential alternatives, but are reduced rapidly in physiological conditions and have low relaxivities as single molecule contrast agents. Herein, we use a supramolecular strategy where cucurbit[8]uril binds with nanomolar affinities to ORCAs and protects them against biological reductants to create a stable radical in vivo. We further overcame the weak contrast by conjugating this complex on the surface of a self-assembled biomacromolecule derived from the tobacco mosaic virus.
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Affiliation(s)
- Hamilton Lee
- Department of Chemistry and Biochemistry , The University of Texas at Dallas , 800 West Campbell Rd. , Richardson , TX 75080 , USA . ; www.twitter.com/gassensmith
| | - Arezoo Shahrivarkevishahi
- Department of Chemistry and Biochemistry , The University of Texas at Dallas , 800 West Campbell Rd. , Richardson , TX 75080 , USA . ; www.twitter.com/gassensmith
| | - Jenica L Lumata
- Department of Chemistry and Biochemistry , The University of Texas at Dallas , 800 West Campbell Rd. , Richardson , TX 75080 , USA . ; www.twitter.com/gassensmith
| | - Michael A Luzuriaga
- Department of Chemistry and Biochemistry , The University of Texas at Dallas , 800 West Campbell Rd. , Richardson , TX 75080 , USA . ; www.twitter.com/gassensmith
| | - Laurel M Hagge
- Department of Chemistry and Biochemistry , The University of Texas at Dallas , 800 West Campbell Rd. , Richardson , TX 75080 , USA . ; www.twitter.com/gassensmith
| | - Candace E Benjamin
- Department of Chemistry and Biochemistry , The University of Texas at Dallas , 800 West Campbell Rd. , Richardson , TX 75080 , USA . ; www.twitter.com/gassensmith
| | - Olivia R Brohlin
- Department of Chemistry and Biochemistry , The University of Texas at Dallas , 800 West Campbell Rd. , Richardson , TX 75080 , USA . ; www.twitter.com/gassensmith
| | - Christopher R Parish
- Department of Physics , The University of Texas at Dallas , 800 West Campbell Rd. , Richardson , TX 75080 , USA
| | - Hamid R Firouzi
- Department of Chemistry and Biochemistry , The University of Texas at Dallas , 800 West Campbell Rd. , Richardson , TX 75080 , USA . ; www.twitter.com/gassensmith
| | - Steven O Nielsen
- Department of Chemistry and Biochemistry , The University of Texas at Dallas , 800 West Campbell Rd. , Richardson , TX 75080 , USA . ; www.twitter.com/gassensmith
| | - Lloyd L Lumata
- Department of Physics , The University of Texas at Dallas , 800 West Campbell Rd. , Richardson , TX 75080 , USA
| | - Jeremiah J Gassensmith
- Department of Chemistry and Biochemistry , The University of Texas at Dallas , 800 West Campbell Rd. , Richardson , TX 75080 , USA . ; www.twitter.com/gassensmith
- Department of Bioengineering , The University of Texas at Dallas , 800 West Campbell Rd. , Richardson , TX 75080 , USA
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12
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Wang XQ, Lei Q, Zhu JY, Wang WJ, Cheng Q, Gao F, Sun YX, Zhang XZ. Cucurbit[8]uril Regulated Activatable Supramolecular Photosensitizer for Targeted Cancer Imaging and Photodynamic Therapy. ACS APPLIED MATERIALS & INTERFACES 2016; 8:22892-22899. [PMID: 27513690 DOI: 10.1021/acsami.6b07507] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Activatable photosensitizers (aPSs) have emerged as promising photodynamic therapy (PDT) agents for simultaneous imaging and selective ablation of cancer. However, traditional synthetic aPSs are limited by complex design and tedious synthesis. Here, aPS regulated by cucurbit[8]uril (CB[8]) for targeted cancer imaging and PDT is reported. This system is based on the host-guest interaction between biotinylated toluidine blue (TB-B) and CB[8] to form 2TB-B@CB[8]. Moreover, a facile strategy to turn off/on the fluorescence and photodynamic activity of TB-B is developed through the reversible assembly/disassembly of 2TB-B@CB[8]. This established system can achieve selective accumulation in tumor, light-up cancer imaging, and enhanced anticancer behavior. Therefore, this work provides a novel and promising strategy for the aPS build via simple and facile regulation of supramolecular chemistry.
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Affiliation(s)
- Xiao-Qiang Wang
- Key Laboratory of Biomedical Polymers of Ministry of Education, Institute for Advanced Studies & Department of Chemistry, Wuhan University , Wuhan 430072, P.R. China
| | - Qi Lei
- Key Laboratory of Biomedical Polymers of Ministry of Education, Institute for Advanced Studies & Department of Chemistry, Wuhan University , Wuhan 430072, P.R. China
| | - Jing-Yi Zhu
- Key Laboratory of Biomedical Polymers of Ministry of Education, Institute for Advanced Studies & Department of Chemistry, Wuhan University , Wuhan 430072, P.R. China
| | - Wen-Jing Wang
- Key Laboratory of Biomedical Polymers of Ministry of Education, Institute for Advanced Studies & Department of Chemistry, Wuhan University , Wuhan 430072, P.R. China
| | - Qian Cheng
- Key Laboratory of Biomedical Polymers of Ministry of Education, Institute for Advanced Studies & Department of Chemistry, Wuhan University , Wuhan 430072, P.R. China
| | - Fan Gao
- Key Laboratory of Biomedical Polymers of Ministry of Education, Institute for Advanced Studies & Department of Chemistry, Wuhan University , Wuhan 430072, P.R. China
| | - Yun-Xia Sun
- Key Laboratory of Biomedical Polymers of Ministry of Education, Institute for Advanced Studies & Department of Chemistry, Wuhan University , Wuhan 430072, P.R. China
| | - Xian-Zheng Zhang
- Key Laboratory of Biomedical Polymers of Ministry of Education, Institute for Advanced Studies & Department of Chemistry, Wuhan University , Wuhan 430072, P.R. China
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13
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Xi YY, Tang Q, Huang Y, Tao Z, Xue SF, Zhou Q, Wei G. A novel fluorescent indicator displacement assay for sensing the anticancer drug gefitinib. Supramol Chem 2016. [DOI: 10.1080/10610278.2016.1202413] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Yun-Yun Xi
- The Engineering and Research Center for Southwest Bio-Pharmaceutical Resources of National Education Ministry of China, Guizhou University, Guiyang, P.R. China
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University, Guiyang, P.R. China
| | - Qing Tang
- The Engineering and Research Center for Southwest Bio-Pharmaceutical Resources of National Education Ministry of China, Guizhou University, Guiyang, P.R. China
| | - Ying Huang
- The Engineering and Research Center for Southwest Bio-Pharmaceutical Resources of National Education Ministry of China, Guizhou University, Guiyang, P.R. China
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University, Guiyang, P.R. China
| | - Zhu Tao
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University, Guiyang, P.R. China
| | - Sai-Feng Xue
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University, Guiyang, P.R. China
| | - Qingdi Zhou
- School of Chemistry, The University of Sydney, Sydney, Australia
| | - Gang Wei
- Commonwealth Scientific and Industrial Research Organization (CSIRO), Manufacturing, Lindfield, Australia
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14
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Li J, Gu X, Yuan X, Qiu Q, Sun J, Wang H. Cis/trans Fluorescent Recognition by Naphthalimide Dyes ⊂ CB [7] Assembly. J Fluoresc 2016; 26:1219-24. [DOI: 10.1007/s10895-016-1807-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Accepted: 03/28/2016] [Indexed: 11/28/2022]
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15
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Density functional theory investigations on binding and spectral features of complexes of ferrocenyl derivatives with cucurbit [7]uril. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2015.12.090] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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16
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Vázquez J, Remón P, Dsouza RN, Lazar AI, Arteaga JF, Nau WM, Pischel U. A simple assay for quality binders to cucurbiturils. Chemistry 2014; 20:9897-901. [PMID: 25043661 DOI: 10.1002/chem.201403405] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2014] [Indexed: 11/07/2022]
Abstract
A new approach towards the rapid identification of quality binders to cucurbiturils--those that combine high affinity with high selectivity for a particular homologue--was developed. The assay exploits macrocycle-specific optical fingerprints (colorimetric or fluorimetric) of carefully selected indicators dyes. The screening of a guest library revealed known (e.g., adamantane derivatives) and new (e.g., terpenes) quality binders. The predictive power of the assay was underpinned by the modeling of the involved thermodynamic equilibria.
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Affiliation(s)
- Julián Vázquez
- CIQSO - Center for Research in Sustainable Chemistry and Department of Chemical Engineering, Physical Chemistry, and Organic Chemistry, University of Huelva, Campus de El Carmen s/n, 21071 Huelva (Spain), Fax: (+34) 959 21 99 83
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17
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Cao L, Šekutor M, Zavalij PY, Mlinarić-Majerski K, Glaser R, Isaacs L. Cucurbit[7]uril⋅Guest Pair with an Attomolar Dissociation Constant. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201309635] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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18
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Cao L, Šekutor M, Zavalij PY, Mlinarić-Majerski K, Glaser R, Isaacs L. Cucurbit[7]uril⋅Guest Pair with an Attomolar Dissociation Constant. Angew Chem Int Ed Engl 2014; 53:988-93. [DOI: 10.1002/anie.201309635] [Citation(s) in RCA: 305] [Impact Index Per Article: 30.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2013] [Indexed: 11/11/2022]
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19
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Dsouza RN, Pischel U, Nau WM. Fluorescent dyes and their supramolecular host/guest complexes with macrocycles in aqueous solution. Chem Rev 2011; 111:7941-80. [PMID: 21981343 DOI: 10.1021/cr200213s] [Citation(s) in RCA: 797] [Impact Index Per Article: 61.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Roy N Dsouza
- School of Engineering and Science, Jacobs University Bremen, Campus Ring 1, D-28759 Bremen, Germany
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20
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Saleh N, Meetani MA, Al-Kaabi L, Ghosh I, Nau WM. Effect of cucurbit[n]urils on tropicamide and potential application in ocular drug delivery. Supramol Chem 2011. [DOI: 10.1080/10610278.2011.593631] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Na'il Saleh
- a Department of Chemistry , College of Science, UAE University , P.O. Box 17551, Al-Ain , United Arab Emirates
| | - Mohammed A. Meetani
- a Department of Chemistry , College of Science, UAE University , P.O. Box 17551, Al-Ain , United Arab Emirates
| | - Leena Al-Kaabi
- a Department of Chemistry , College of Science, UAE University , P.O. Box 17551, Al-Ain , United Arab Emirates
| | - Indrajit Ghosh
- b School of Engineering and Science, Jacobs University Bremen , Campus Ring 1, D-28759 , Bremen , Germany
| | - Werner M. Nau
- b School of Engineering and Science, Jacobs University Bremen , Campus Ring 1, D-28759 , Bremen , Germany
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Macartney DH. Encapsulation of Drug Molecules by Cucurbiturils: Effects on their Chemical Properties in Aqueous Solution. Isr J Chem 2011. [DOI: 10.1002/ijch.201100040] [Citation(s) in RCA: 126] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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Koner AL, Ghosh I, Saleh N, Nau WM. Supramolecular encapsulation of benzimidazole-derived drugs by cucurbit[7]uril. CAN J CHEM 2011. [DOI: 10.1139/v10-079] [Citation(s) in RCA: 115] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
UV–vis and NMR spectroscopic techniques were employed to demonstrate the ability of the synthetic macrocyclic host cucurbit[7]uril (CB7) to solubilize and stabilize widely used fungicides and anthelmintic drugs of the benzimidazole family in water, namely, albendazole (ABZ), carbendazim (CBZ), thiabendazole (TBZ), fuberidazole (FBZ), and the parent benzimidazole (BZ). CB7 binds the protonated forms of these guests very strongly (e.g., K = 2.6 × 107 L/mol for ABZ) but their neutral forms significantly more weakly (e.g., K = 6.5 × 104 L/mol for ABZ), which reflects a complexation-induced increase of their pKa values by 2.6 units for ABZ, 2.5 units for CBZ, 4.0 units for TBZ, 3.8 units for FBZ, and 3.5 units for BZ. The absolute drug solubilities increased upon complexation from 0.003 to 0.300 mmol/L for ABZ, from 0.160 to 1.12 mmol/L for CBZ, from 0.110 to 1.11 mmol/L for TBZ, and from 0.25 to 0.75 mmol/L for FBZ (for BZ, the solubility enhancement was found to be insignificant). Complexation by CB7 further improves the photostability of the drugs and alters their photophysical properties.
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Affiliation(s)
- Apurba L. Koner
- School of Engineering and Science, Jacobs University Bremen, Campus Ring 1, D-28759 Bremen, Germany
- Department of Chemistry, College of Science, UAE University, P.O. Box 17551, Al-Ain, UAE
| | - Indrajit Ghosh
- School of Engineering and Science, Jacobs University Bremen, Campus Ring 1, D-28759 Bremen, Germany
- Department of Chemistry, College of Science, UAE University, P.O. Box 17551, Al-Ain, UAE
| | - Na'il Saleh
- School of Engineering and Science, Jacobs University Bremen, Campus Ring 1, D-28759 Bremen, Germany
- Department of Chemistry, College of Science, UAE University, P.O. Box 17551, Al-Ain, UAE
| | - Werner M. Nau
- School of Engineering and Science, Jacobs University Bremen, Campus Ring 1, D-28759 Bremen, Germany
- Department of Chemistry, College of Science, UAE University, P.O. Box 17551, Al-Ain, UAE
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Wheate NJ, Vora V, Anthony NG, McInnes FJ. Host–guest complexes of the antituberculosis drugs pyrazinamide and isoniazid with cucurbit[7]uril. J INCL PHENOM MACRO 2010. [DOI: 10.1007/s10847-010-9795-3] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Abstract
Background: Cucurbit[n]urils (CB[n]; n = 5, 6, 7, 8 or 10) are a family of macrocycles made from the acid-catalyzed condensation of glycoluril and formaldehyde. Results: The synthesis of CB[n] using microwave radiation has been examined and the effect of acid type, reaction time and temperature on the distribution of products has been determined. Synthesis in HCl yields CB[5], CB[6], CB[7] and CB[8] in 10 min and is most efficient at 160°C. Synthesis in H2SO4yields mostly CB[6] in 3 min and is most efficient at 160°C. Conclusion: Microwave synthesis provides an efficient and cost-effective method for the large-scale production of CB[n] for a range of applications, particularly drug delivery.
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McInnes FJ, Anthony NG, Kennedy AR, Wheate NJ. Solid state stabilisation of the orally delivered drugs atenolol, glibenclamide, memantine and paracetamol through their complexation with cucurbit[7]uril. Org Biomol Chem 2010; 8:765-73. [PMID: 20135032 DOI: 10.1039/b918372h] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The inclusion of the cardiovascular beta-blocker drug atenolol, the antidiabetic drug glibenclamide, the Alzheimer's NMDA glutamate receptor drug memantine and the analgesic/antipyretic drug paracetamol by cucurbit[7]uril (CB[7]) has been studied by (1)H nuclear magnetic resonance spectroscopy, electrospray ionisation mass spectrometry, molecular modelling, fluorescence displacement assays and differential scanning calorimetry. All four drugs form 1 : 1 host-guest complexes with CB[7], but the exchange kinetics and location of the binding is different for each drug. Atenolol is bound over the central phenyl ring with a binding constant of 4.2 x 10(4) M(-1), whereas glibenclamide is bound over the terminal cyclohexyl group with a binding constant of 1.7 x 10(5) M(-1), and memantine is totally bound within the CB[7] cavity. Paracetamol is bound in two locations, over the central phenyl ring and over the methyl group, with the CB[7] molecule shuttling quickly between the two sites. Inclusion by CB[7] was shown by differential scanning calorimetry to physically stabilise all four drugs, which has applications preventing drug degradation and improving drug processing and formulation.
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Affiliation(s)
- Fiona J McInnes
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, John Arbuthnott Building, 27 Taylor Street, Glasgow, United KingdomG4 0NR
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Pinjari RV, Khedkar JK, Gejji SP. Cavity diameter and height of cyclodextrins and cucurbit[n]urils from the molecular electrostatic potential topography. J INCL PHENOM MACRO 2009. [DOI: 10.1007/s10847-009-9657-z] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Montes-Navajas P, Garcia H. Complexes of basic tricyclic dyes in their acid and basic forms with cucurbit[7]uril: Determination of pKa and association constants in the ground and singlet excited state. J Photochem Photobiol A Chem 2009. [DOI: 10.1016/j.jphotochem.2009.02.019] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Kennedy AR, Florence AJ, McInnes FJ, Wheate NJ. A chemical preformulation study of a host–guest complex of cucurbit[7]uril and a multinuclear platinum agent for enhanced anticancer drug delivery. Dalton Trans 2009:7695-700. [DOI: 10.1039/b907917c] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Wheate NJ. Improving platinum(II)-based anticancer drug delivery using cucurbit[n]urils. J Inorg Biochem 2008; 102:2060-6. [PMID: 18653238 DOI: 10.1016/j.jinorgbio.2008.06.005] [Citation(s) in RCA: 111] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2008] [Revised: 06/09/2008] [Accepted: 06/10/2008] [Indexed: 11/29/2022]
Abstract
Despite the synthesis of hundreds of new platinum(II) and platinum(IV)-based complexes each year as potential anticancer drugs, only three have received world-wide approval: cisplatin, carboplatin and oxaliplatin. The next big advance in platinum-based chemotherapy is not likely to come from the development of new drugs, but from the controlled and targeted delivery of already approved drugs or those in late stage clinical trials. Encapsulation of platinum drugs inside macromolecules has already demonstrated promise, and encapsulation within cucurbit[n]urils has shown particular potential. Partial or full encapsulation within cucurbit[n]urils provides steric hindrance to drug degradation by peptides and proteins, and the use of different sized cucurbit[n]urils allows for the tuning of drug release rates, cytotoxicity and toxicity.
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Affiliation(s)
- Nial J Wheate
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, John Arbuthnott Building, 27 Taylor Street, Glasgow G4 0NR, United Kingdom.
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Wheate NJ, Kumar PGA, Torres AM, Aldrich-Wright JR, Price WS. Examination of cucurbit[7]uril and its host-guest complexes by diffusion nuclear magnetic resonance. J Phys Chem B 2008; 112:2311-4. [PMID: 18247599 DOI: 10.1021/jp709847p] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The self-diffusion of cucurbit[7]uril (CB[7]) and its host-guest complexes in D2O has been examined using pulsed gradient spin-echo nuclear magnetic resonance spectroscopy. CB[7] diffuses freely at a concentration of 2 mM with a diffusion coefficient (D) of 3.07 x 10(-10) m(2) s(-1). At saturation (3.7 mM), CB[7] diffuses more slowly (D = 2.82 x 10(-10) m(2) s(-1)) indicating that it partially self-associates. At concentrations between 2 and 200 mM, CsCl has no effect on the diffusion coefficient of CB[7] (1 mM). Conversely, CB[7] (2 mM) significantly affects the diffusion of 133Cs+ (1 mM), decreasing its diffusion coefficient from 1.86 to 0.83 x 10(-9) m(2) s(-1). Similar changes in the rate of diffusion of other alkali earth metal cations are observed upon the addition of CB[7]. The diffusion coefficient of 23Na+ changes from 1.26 to 0.90 x 10(-9) m(2) s(-1) and 7Li+ changes from 3.40 to 3.07 x 10(-9) m(2) s(-1). In most cases, encapsulation of a variety of inorganic and organic guests within CB[7] decreases their rates of diffusion in D2O. For instance, the diffusion coefficient of the dinuclear platinum complex trans-[[PtCl(NH3)2}2mu-dpzm](2+) (where dpzm is 4,4'-dipyrazolylmethane) decreases from 4.88 to 2.95 x 10(-10) m(2) s(-1) upon encapsulation with an equimolar concentration of CB[7].
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Affiliation(s)
- Nial J Wheate
- Nanoscale Organisation and Dynamics Group, School of Biomedical and Health Sciences, University of Western Sydney, Locked Bag 1797, Penrith South DC 1797, NSW, Australia
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Kemp S, Wheate NJ, Wang S, Collins JG, Ralph SF, Day AI, Higgins VJ, Aldrich-Wright JR. Encapsulation of platinum(II)-based DNA intercalators within cucurbit[6,7,8]urils. J Biol Inorg Chem 2007; 12:969-79. [PMID: 17653578 DOI: 10.1007/s00775-007-0269-z] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2007] [Accepted: 05/25/2007] [Indexed: 10/23/2022]
Abstract
The partial encapsulation of platinum(II)-based DNA intercalators of the type [Pt(5-Cl-phen)(ancillary ligand)](2+), where 5-Cl-phen is 5-chloro-1,10-phenanthroline and the ancillary ligand is ethylenediamine, (1S,2S)-diaminocyclohexane (S,S-dach) or (1R,2R)-diaminocyclohexane, within cucurbit[n]uril (CB[n], where n is 6, 7 or 8) has been examined by (1)H and (195)Pt NMR and mass spectrometry. For CB[7], the molecule encapsulates over the ancillary ligand of all metal complexes, whether this is ethylenediamine or diaminocyclohexane. For CB[8], encapsulation occurs over the sides of the 5-Cl-phen ligand at low [Pt(5-Cl-phen)(S,S-dach)](2+) (5CLSS) to CB[8] ratios (i.e. 0.25:1) but over the ancillary ligand at higher ratios (i.e. 2:1). For CB[6] binding, 5CLSS exhibits both portal and cavity binding, with the ancillary ligand displaying chemical shifts consistent with fast exchange kinetics on the NMR timescale for portal binding and slow exchange kinetics for cavity binding. Binding constants could not be determined using UV-vis, circular dichroism or fluorescence spectrophotometry, but a binding constant for binding of 5CLSS to CB[6] of approximately 10(5) M(-1) was determined using (1)H NMR. Finally, the effect of CB[n] encapsulation on the cytotoxicity of the metal complexes was examined using L1210 murine leukaemia cells in vitro growth inhibition assays. The cytotoxicity is highly dependent on both the metal complex and the CB[n] size, and whilst CB[7] and CB[8] generally decreased cytotoxicity, it was found that CB[6] increased the cyotoxicity of 5CLSS up to 2.5-fold.
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Affiliation(s)
- Sharon Kemp
- School of Biomedical and Health Sciences, University of Western Sydney, Locked Bag 1797, Penrith South DC, NSW 1797, Australia
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